Install pip with python3.8.

PiperOrigin-RevId: 348823866
Change-Id: Ib7daf3b30d3f3de81af96f63f16409ab59f44bcc
diff --git a/tensorflow/tools/ci_build/install/install_pip_packages.sh b/tensorflow/tools/ci_build/install/install_pip_packages.sh
index f9893f0..59118c9 100755
--- a/tensorflow/tools/ci_build/install/install_pip_packages.sh
+++ b/tensorflow/tools/ci_build/install/install_pip_packages.sh
@@ -18,7 +18,7 @@
 
 # Get the latest version of pip so it recognize manylinux2010
 wget https://bootstrap.pypa.io/get-pip.py
-python3 get-pip.py
+python3.8 get-pip.py
 python get-pip.py
 rm -f get-pip.py